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CLOSTBBIUM DIAHAE, EHRB,
page 18» February 1872«
241) •

- Fresh-water Algae of the United States
(Smithsonian contribution to knowledge,

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C. anguste fusiforme, semilun&re, utroque polo valde attenuatum,
apicibus subacutis; cytioder mate achroo (vel dilutissime urn-
brino), striis subtilissimis medio interruptis praedito, in
media parte striis transversalibus 3-5; vesiculis in quoque
erure 6-7, in serie unioa axili dispositis; laminis chlorophy-
llaceis pluribus, saepe flexuosis; looello indistincto, corpus-
culis pluribus vivide mcbilibus. (R.)

Diam.-Lat. 4/7500" = .00053*. long. 69/7500" = .00082".

Syn.-C. Dianae, EHRE1TBERG. RABEHEORST, Flora Europ. Alga rum, Sect»
111* p. 133*

Hab.-Georgia; Florida; Rhode Island; Bailey. Pennsylvania; Wood.

Frond crescent-shaped, six or eight times as long as broad, much
ourxred, rapidly attenuated; upper margin very convex, lower very
concave without a central inflation; ends subacute with, a very
slight emargination at the upper outer extremity; large granules
in a single series;nempty frond, somewhat straw-colored, or faint-
ly reddish, without striae, suture evident. (A.)

REMARKS.-Mr. Archer marks C. Venus, KTZ., as a doubtful synonym of
this species;_nol having Prof. E/ut zingrs work at hand, I do not
know wfietfier C. Venus, fiPZ. is really the following species or not.
The two foims here known as C. Dianoe, EHRB. and C. Venus. KTZ. are
however, I think sufficiently distinguished.	*

Fig. 4, pi. 12, represents this species of desmid.

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